Metal-detection gateway



FIG. 1 is a front right perspective view showing the metal-dectection gateway of our new design;

FIG. 2 is a left rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a front view of the design of FIG. 1 with the control unit removed; and,

FIG. 6 is a top view of the design shown in FIG. 5. 

The ornamental design for metal-detection gateway, as shown. 